Java-Stream-Collectors

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How to convert a Stream into a Map in Java

Last Updated: 21 June 2020

Introduced in Java 8, the Stream API is used to process collections of objects. A stream is a sequence of objects that supports various meth ...read more

Java

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Java-Stream-Collectors

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Java-Collectors

Collectors collectingAndThen() method in Java with Examples

Last Updated: 16 June 2022

The collectingAndThen(Collector downstream, Function finisher) method of class collectors in Java, which adopts Collector so that we can per ...read more

Java

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Java-Stream-Collectors

Java-Collectors

Reverse elements of a Parallel Stream in Java

Last Updated: 11 December 2018

Given a Parallel Stream in Java, the task is to reverse its elements. Examples:Input: Parallel Stream = {11, 22, 33, 44}Output: {44, 33, 22, ...read more

Java-Stream-Collectors

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Java-Stream-programs

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Collectors toMap() method in Java with Examples

Last Updated: 06 December 2018

The toMap() method is a static method of Collectors class which returns a Collector that accumulates elements into a Map whose keys and valu ...read more

Java-Stream-Collectors

Java-Collectors

Collectors partitioningBy() method in Java

Last Updated: 06 December 2018

Collectors partitioningBy() method is a predefined method of java.util.stream.Collectors class which is used to partition a stream of object ...read more

Java-Stream-Collectors

Java 8

Java-Collectors

Collectors toList() method in Java with Examples

Last Updated: 06 December 2018

The toList() method of Collectors Class is a static (class) method. It returns a Collector Interface that gathers the input data onto a new ...read more

Java-Stream-Collectors

Java-Collectors

Java Stream | Collectors toCollection() in Java

Last Updated: 06 December 2018

Collectors toCollection(SupplierC collectionFactory) method in Java is used to create a Collection using Collector. It returns a Collector t ...read more

Java-Stream-Collectors

Java-Collectors

Collectors toSet() in Java with Examples

Last Updated: 06 December 2018

Collectors toSet() returns a Collector that accumulates the input elements into a new Set. There are no guarantees on the type, mutability, ...read more

Java-Stream-Collectors

Java-Collectors

Java | Collectors maxBy(Comparator comparator) with Examples

Last Updated: 06 December 2018

Collectors maxBy(Comparator? super T comparator) is used to find an element according to the comparator passed as the parameter. It returns ...read more

Java-Stream-Collectors

Java-Collectors

Java | Collectors minBy(Comparator comparator) with Examples

Last Updated: 06 December 2018

Collectors minBy(Comparator? super T comparator) is used to find an element according to the comparator passed as the parameter. It returns ...read more

Java-Stream-Collectors

Java-Collectors

Java | Collectors averagingDouble() with Examples

Last Updated: 06 December 2018

Collectors averagingDouble(ToDoubleFunction? super T mapper) method is used to find the mean of the double values passed in the parameters. ...read more

Java-Stream-Collectors

Java-Collectors

Java | Collectors averagingLong (ToLongFunction mapper) with Examples

Last Updated: 06 December 2018

Collectors averagingLong(ToLongFunction? super T mapper) method is used to find the mean of the long values passed in the parameters. This m ...read more

Java-Stream-Collectors

Java-Collectors

Java 8 | Collectors counting() with Examples

Last Updated: 06 December 2018

Collectors counting() method is used to count the number of elements passed in the stream as the parameter. It returns a Collector accepting ...read more

Java-Stream-Collectors

Java-Collectors

Java 8 | Collectors averagingInt() with Examples

Last Updated: 06 December 2018

Collectors averagingInt(ToIntFunction? super T mapper) method is used to find the mean of the integers passed in the parameters. This method ...read more

Java-Stream-Collectors

Java-Collectors

Java 8 Streams | Collectors.joining() method with Examples

Last Updated: 17 January 2023

The joining() method of Collectors Class, in Java, is used to join various elements of a character or string array into a single string obje ...read more

Java-Stream-Collectors

Java-Collectors